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The state highways of Colorado are a system of public paved roads funded and maintained by the Colorado Department of Transportation (CDOT) in the U.S. state of Colorado. These are state highways, which are typically abbreviated SH. The numbered highways within the state begin at 1 and increase, with exception of numbers already designated as United States Numbered Highways or Interstate Highways. In 1953, many highways were decommissioned or lost mileage. Before the 1968 Colorado state highway renumbering, highways were cosigned with U.S. Highways and Interstate Highways, and there were highways matching U.S. Highway and Interstate Highway numbers.
| State Highways in Colorado | |
|---|---|
.svg) .svg) .svg)   State highway signs for SH 5 (1926), SH 30 (1946), SH 50 (1952), and modern day SH 83 and SH 470 | |
| Highway names | |
| Interstates | Interstate X (I-X) |
| US Highways | U.S. Highway X (US X) |
| State | State Highway X (SH X) |
| System links | |
| |
The numbered state highway system covers approximately 3,135 miles of road in Colorado, subtracting the total miles of Interstate and US Highways from 9,100 miles of the state highway system.[1] These are maintained using state funds which are collected by state and federal gas tax and a portion of vehicle registration fees.[2] Unlike the numbering systems of the Interstate Highway System and the United States Numbered Highway System handled by the American Association of State Highway and Transportation Officials (AASHTO), the numbered state highway system is a separate system used by the state. The route markers used are separate from neighboring states rather than being consistent. In Colorado, the route markers are designed with the state flag on the top half and the number on the bottom half.
Most state highways are generally two lane roads with speed limits up to 65 miles per hour in rural areas but can drop as low as 30 miles per hour in served communities. In urban areas, they can be six to eight lane expressways primarily in Denver and Colorado Springs. Some numbered routes are concurrent with US highways and Interstate Highways and concurrent sections of state highway are not recognized by CDOT. Concurrent sections generally has its mileage based off the Interstate or US Route mileage (e.g. SH 88 being concurrent with I-25) and are sometimes unsigned.[3] The longest state highway is State Highway 14 with a span of nearly 237 miles (381 km) between Muddy Pass and Sterling. State Highway 110 is the shortest route maintained by CDOT with a span of 0.186 miles (0.299 km).
The Colorado Department of Transportation (CDOT) is the agency responsible for maintaining the Colorado State Highway System, including Interstate Highways, United States Numbered Highways, and numbered state highways within the state of Colorado.[4]
| Number | Length (mi)[lower-alpha 1] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 SH 1 |
10.053[5] | 16.179 | US 287 near Fort Collins | I-25 at Wellington | c. 1923[6] | current | Was a cross state highway that ran from New Mexico to Wyoming until 1968. Turned back sections are now I-25, US 85, and US 287[6] | |
 SH 2 |
19.944[7] | 32.097 | US 285 at Denver | I-76 near Brighton | c. 1923[8] | current | Until 1968, went west to Utah via US 40 and northeast to Nebraska via US 6 and US 138; rerouted south of US 40 in 1968; extended north to SH 7 in 1998, but that section was given to the city of Brighton in 2010[8] | |
 SH 3 |
82.745 | 133.165 | US 85 at the Wyoming border | I-80S in Henderson | c. 1923 | 1968 | Carrier route overlapping US 85[9] | |
 SH 3 |
2.44 | 3.93 | US 160/US 550 near Durango | US 160/US 550 near Durango | c. 1981 | current | ||
 SH 4 |
— | — | Utah border | Kansas border | c. 1923 | 1968 | Carrier route overlapping US 24 | |
 SH 5 |
— | — | US 87 near Carr | US 85 near Carr | c. 1923 | 1938 | Now CR 126 | |
 SH 5 |
— | — | SH 259 near Windsor | Galeton | c. 1938 | 1953 | Now CR 74 | |
 SH 5 |
— | — | Iliff Avenue in Denver | SH 70 in Denver | c. 1953 | 1954 | Syracuse Way, Denver | |
 SH 5 |
14.89 | 23.96 | Summit of Mount Blue Sky | SH 103 near Idaho Springs | 1954 | current | ||
 SH 6 |
— | — | Grand Junction | Kansas border | c. 1923 | 1968 | Carrier route overlapping US 50 | |
 SH 7 |
81.64 | 131.39 | US 36 in Estes Park | I-76 in Brighton | c. 1923 | current | ||
 SH 8 |
8.68 | 13.97 | US 285 near Morrison | SH 121 at Lakewood | c. 1923 | current | Until 1968, continued southwest to US 24/SH 4 via US 285 and continued east to Kansas via Wadsworth Avenue, Jewell Avenue, Pierce Street, Mississippi Avenue, Morrison Road, Alameda Avenue, I-25, and US 40 | |
 SH 9 |
138.92 | 223.57 | US 50 near Cañon City | US 40 in Kremmling | c. 1923 | current | Until 1953, continued via Royal Gorge to Cañon City | |
 SH 10 |
71.96 | 115.81 | I-25/US 160 at Walsenburg | US 50 at La Junta | c. 1923 | current | Until 1968, continued west to Utah via US 160 and US 491 | |
 SH 11 |
— | — | US 6 at Wolcott | SH 9 at Kremmling | c. 1923 | 1953 | southern portion replaced by SH 131; remainder is now Trough Road / CR 1 | |
 SH 11 |
— | — | Nevada Avenue in Colorado Springs | Nevada Avenue in Colorado Springs | c. 1958 | 1968 | Carrier route overlapping I-25 | |
 SH 11 |
1.35 | 2.17 | US 138 at Julesburg | Nebraska state line | c. 1970 | current | ||
 SH 12 |
70.36 | 113.23 | US 160 at La Veta | I-25 at Trinidad | c. 1923 | current | Until 1968, continued northeast to La Junta via US 350 | |
 SH 13 |
127.99 | 205.98 | I-70 near Rifle | WYO 789 near Baggs | c. 1923 | current | ||
 SH 14 |
236.92 | 381.29 | US 40 at Muddy Pass | US 6 at Sterling | c. 1923 | current | Until 1968, continued east via US 6 to Nebraska | |
 SH 15 |
30.92 | 49.76 | US 160/US 285 in Monte Vista | US 285 in La Jara | c. 1923 | current | ||
 SH 16 |
— | — | US 40 in Granby | US 6 in Wiggins | c. 1923 | 1968 | Carrier route overlapping US 34 | |
 SH 16 |
1.31 | 2.11 | I-25 in Security | SH 21 in Widefield | 1971 | current | Extended east from Syracuse Street to SH 21 (which was created that same day) in October 2007 | |
 SH 17 |
88.5 | 142.4 | New Mexico state line | US 285 south of Villa Grove | c. 1923 | current | ||
 SH 18 |
— | — | Julesburg Reservoir near Sedgwick | US 138 in Ovid | c. 1938 | 1953 | ||
 SH 18 |
— | — | I-25 in Pueblo | US 50 near Avondale | c. 1958 | 1968 | Carrier route overlapping US 50 | |
 SH 18 |
0.29 | 0.47 | Spruce Mountain Road | Jct I-25 Exit 172 near Larkspur | 1973 | c. 1999 | Signage not removed until 2001; now Upper Lake Gulch Road; was the shortest state highway with a length of 1531 feet | |
 SH 19 |
— | — | New Mexico border | US 50 in Montrose | c. 1923 | 1968 | Carrier route overlapping US 550 | |
 SH 20 |
— | — | SH 119 west of Golden | SH 58/SH 93 in Golden | c. 1934 | c. 1951 | Replaced by US 6 | |
 SH 20 |
— | — | BL 70/US 6/US 50 in Grand Junction | US 6 in Palisade | c. 1956 | 1968 | Replaced by parts of BL 70, US 6, and US 50 | |
 SH 21 |
— | — | US 85 near Platteville | US 85 near Platteville | c. 1923 | 1939 | Loop east of US 85 through Platteville | |
 SH 21 |
— | — | Near Paoli | Near Paoli | c. 1938 | 1953 | Spurs north and south off US 6 | |
 SH 21 |
— | — | Loyd | SH 13 south of Hamilton | c. 1953 | 1954 | ||
| SH 21 |
— | — | Nebraska border | SH 14 near Stoneham | c. 1954 | 1964 | Became part of SH 71 | |
 SH 21 |
20.56 | 33.09 | SH 16 (Mesa Ridge Parkway) in Security-Widefield | SH 83 near Black Forest | 2007 | current | Established in October 2007 and is co-signed with Powers Boulevard | |
 SH 22 |
— | — | 20th Street in Greeley | Current BL 34 in Greeley | c. 1936 | 1953 | ||
 SH 22 |
2.47 | 3.98 | Brighton Road in Henderson | Sable Boulevard near Brighton | c. 1953 | current | ||
 SH 23 |
— | — | US 138 in Ovid | Nebraska state line | c. 1938 | 1953 | ||
 SH 23 |
— | — | SH 62 in Ridgway | US 550 near Ouray | c. 1953 | 1989 | Now CR 23 and CR 3A | |
| SH 23 |
17.83 | 28.69 | US 385 in Holyoke | N-23 at the Nebraska state line | 1989 | current | Renumbered from SH 176 to avoid confusion with nearby I-76 and to match Nebraska | |
 SH 24 |
— | — | US 6 west of Holyoke | US 385 south of Holyoke | c. 1938 | 1953 | ||
 SH 24 |
— | — | 104th Avenue and Colorado Boulevard in Thornton | SH 2 in Commerce City | c. 1953 | 1968 | Renumbered to SH 44 to avoid confusion with US 24 | |
 SH 25 |
— | — | Logan CR 81 | US 138 in Crook | c. 1938 | 1968 | Renumbered to SH 55 to avoid confusion with I-25 | |
 SH 26 |
— | — | — | — | c. 1938 | c. 1940 | ||
 SH 26 |
— | — | — | — | c. 1940 | 1953 | ||
 SH 26 |
— | — | — | — | c. 1953 | 1965 | ||
 SH 26 |
2.82 | 4.54 | SH 95 in Denver | I-25 in Denver | c. 1966 | current | ||
 SH 27 |
— | — | — | — | c. 1938 | 1953 | ||
| SH 27 |
— | — | — | — | c. 1953 | 1956 | ||
 SH 27 |
— | — | — | — | c. 1956 | 1968 | Carrier route for US 85-87 | |
 SH 28 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 28 |
— | — | — | — | c. 1953 | c. 1989 | Turned back to the county when the US 287 Laporte bypass was built; now CR 52E | |
 SH 29 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 29 |
— | — | US 87 in Colorado Springs | SH 83 (now Academy Blvd) in Colorado Springs | c. 1964 | 2007 | Decommissioned in October 2007 as part of a highway swap to get Powers Blvd. to become SH 21; signage was not removed until spring 2008. Now Circle Dr and Airport Rd. | |
 SH 30 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 30 |
— | — | — | — | c. 1953 | c. 1954 | Now CR R | |
 SH 30 |
20.41 | 32.85 | US 285 and I-25 in Denver | Quincy Avenue and Gun Club Road in Aurora | c. 1954 | current | ||
 SH 31 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 31 |
— | — | — | — | c. 1963 | c. 1969 | Swapped out when SH 470 opened to traffic. Now County Line Road[10] | |
 SH 32 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 32 |
— | — | — | — | 1959 | c. 1962 | Eastern 5 miles was SH 146 until 1953; now CR G | |
 SH 32 |
— | — | I-70 exit 286 in Aurora | I-70 Bus./US 40/US 287 in Aurora | 1968 | c. 2004 | Now Tower Road | |
 SH 33 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 33 |
— | — | — | — | c. 1966 | 1968 | Carrier route for I-225 | |
 SH 33 |
— | — | I-25 near downtown Denver | SH 2 in Denver | 1968 | 2002 | ||
 SH 34 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 35 |
— | — | — | — | c. 1938 | 1953 | Now CR 19 | |
 SH 35 |
1.01 | 1.63 | I-70 in Denver | Along Quebec Street in Denver | 1972 | current | ||
 SH 36 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 36 |
— | — | I-25 near downtown Denver | SH 2 in Denver | 1960 | 1968 | Renumbered SH 33 to avoid confusion with US 36 and new SH 36 | |
 SH 36 |
24.4 | 39.3 | I-70 near Watkins | US 36/SH 40 in Byers | 1968 | current | ||
 SH 37 |
— | — | US 34 in Kersey | SH 392 in Lucerne | 1938 | 2007 | Until 1953, continued south to US 6 northeast of Hudson; decommissioned in March 2007 as part of the north front range route swap | |
 SH 38 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 38 |
— | — | I-25 in Colorado Springs | I-25 Bus. (now US 87) in Colorado Springs | 1963 | 2007 | Decommissioned in October 2007 as part of a highway swap to number Powers Boulevard as SH 21; signage was not removed until spring 2008; now Fillmore Street | |
 SH 39 |
7.57 | 12.18 | I-76 in Wiggins | SH 144 near Jackson Lake State Park | 1938 | current | ||
 SH 40 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 40 |
— | — | — | — | 1963 | 1968 | Became part of the routing of US 164 in 1966; now US 160 | |
 SH 40 |
24.1 | 38.8 | US 36/SH 36 in Byers | Main Street in Agate | 1968 | current | Former portion of US 40 | |
 SH 41 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 41 |
9.50 | 15.29 | US 160 | SR 162 at the Utah state line | — | — | ||
 SH 42 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 42 |
4.87 | 7.84 | Baseline Road/SH 7 in Lafayette | US 287 in Lafayette | c. 1961 | current | Most of this route was part of SH 168 until 1953 | |
 SH 43 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 44 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 44 |
4.95 | 7.97 | 104th Avenue and Colorado Boulevard in Thornton | SH 2 in Commerce City | — | — | ||
 SH 45 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 45 |
8.73 | 14.05 | I-25 south of Pueblo | US 50 northwest of Pueblo | 1966 | current | Cosigned with Pueblo Boulevard | |
 SH 46 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 46 |
6.61 | 10.64 | SH 119 near Black Hawk | Jefferson County line (becomes CR 70) | 1973 | current | ||
 SH 47 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 47 |
4.63 | 7.45 | I-25 in north Pueblo | US 50/SH 96 east of Pueblo | c. 1970 | current | ||
 SH 48 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 49 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 49 |
— | — | — | — | c. 1967 | 1968 | Carrier route overlapping US 36 | |
 SH 50 |
— | — | — | — | c. 1923 | 1968 | Renumbered as an extension of SH 105 to avoid confusion with US 50 | |
 SH 51 |
— | — | US 50 in Granada | US 138 in Julesburg | c. 1923 | 1968 | Entirely overlapped US 385; until 1953 it continued north to Nebraska via current SH 11 and southeast via Two Buttes, Walsh, Stonington, and Midway to Kansas. | |
 SH 51 |
— | — | SH 7 in Brighton | I-76 exit 17 near Brighton | 1968 | 1998 | Became part of SH 2; this section of SH 2 was given to the city of Brighton in 2010 | |
 SH 52 |
111 | 179 | SH 119 near Niwot | SH 14 at Raymer | c. 1923 | current | ||
 SH 53 |
— | — | — | — | c. 1923 | 1953 | ||
 SH 53 |
1.66 | 2.67 | E. 58th Avenue in Denver | SH 224 north of Denver in Adams County | 1971 | current | ||
 SH 54 |
— | — | — | — | c. 1923 | 1968 | Carrier route overlapping US 34 | |
 SH 55 |
— | — | — | — | c. 1923 | 1953 | Original route for US 160, but was trimmed back to SH 206 in 1950 after US 160 was rerouted along SH 100; turned back a year later | |
 SH 55 |
5.65 | 9.09 | Logan CR 81 | US 138 in Crook | 1968 | current | ||
 SH 56 |
6.7 | 10.8 | US 287 west of Berthoud | I-25 east of Berthoud | c. 1923 | current | Section from US 287 to CR 23 was decommissioned in March 2007 as part of the north front range route swap; continued northwest to US 34 until 1950, and to halfway between US 34 and US 287 until 1953 | |
 SH 57 |
0.53 | 0.85 | I-70 | US 24 in Stratton | c. 1923 | current | Until 1953, continued north to US 36 in Kirk; truncated to 9 miles north of US 24 in 1953, and to current route in 1992 | |
 SH 58 |
5.43 | 8.74 | US 6/SH 93 in Golden | I-70 in Wheat Ridge | c. 1923 | current | Until 1953, continued west via Golden Gate Canyon Road and SH 46 to SH 119 | |
 SH 59 |
173.30 | 278.90 | US 40/US 287 at Kit Carson | US 138 in Sedgwick | c. 1923 | current | Until 1953, continued north to Nebraska and south to Oklahoma | |
 SH 60 |
19.99 | 32.17 | US 287 in Campion | US 85 southwest of Gilcrest | c. 1923 | current | ||
 SH 61 |
40.99 | 65.97 | US 34 in Otis | US 6 near Sterling | c. 1923 | current | ||
 SH 62 |
23.40 | 37.66 | SH 145 near Placerville | US 550 near Ridgeway | c. 1923 | current | ||
 SH 63 |
56.41 | 90.78 | US 36 in Anton | US 6 in Atwood | c. 1923 | current | ||
 SH 64 |
73.70 | 118.61 | US 40 in Dinosaur | SH 13 near Meeker | c. 1923 | current | ||
 SH 65 |
61.38 | 98.78 | SH 92 near Delta | I-70 near Palisade | c. 1923 | current | ||
 SH 66 |
22.69 | 36.52 | US 36 near Lyons | US 85 in Platteville | c. 1923 | current | Section from US 36 to Estes Park decommissioned in March 2007 as part of the north front range route swap | |
 SH 67 |
71.72 | 115.42 | SH 96 in Wetmore | US 85 in Sedalia | c. 1923 | current | ||
 SH 68 |
— | — | — | — | c. 1923 | 1953 | ||
 SH 68 |
— | — | US 287 in Fort Collins | I-25 in Fort Collins | c. 1968 | 2005 | Given to the city of Fort Collins | |
 SH 69 |
82.87 | 133.37 | I-25 Bus. near Walsenburg | US 50 at Texas Creek | c. 1923 | current | ||
 SH 70 |
— | — | Kipling Street in Morrison | SH 7 in Brighton | c. 1923 | 1968 | Section from US 40/US 287 to Morrison became part of rerouted US 285 and the rest was renumbered SH 51 | |
 SH 71 |
224.65 | 361.54 | US 350 near La Junta | N-71 at the Nebraska state line | c. 1923 | current | ||
 SH 72 |
51.55 | 82.96 | I-70 in Wheat Ridge | SH 7 near Allenspark | c. 1923 | current | ||
 SH 73 |
— | — | US 285 in Conifer | SH 74 at Evergreen | c. 1923 | 1965 | Signs still show SH 73 | |
 SH 74 |
18.01 | 28.98 | I-70 at El Rancho exit | SH 8 in Morrison | c. 1923 | current | ||
 SH 75 |
3.71 | 5.97 | SH 470 near Littleton | Bowles Avenue at Lowry Street in Littleton | c. 1923 | current | Previously Unsigned due to theft, however, CDOT replaced the sign between November 2014 and May 2015 | |
 SH 76 |
— | — | SH 165 southwest of Beulah | SH 45 in southwest Pueblo | c. 1923 | 1976 | Renamed SH 78 in 1975 to avoid duplication when I-80S was renamed I-76 | |
 SH 77 |
— | — | — | — | c. 1923 | 1954 | Now CR 77 | |
 SH 78 |
— | — | — | — | c. 1923 | 1968 | Swapped with SH 293 in 1940; carrier route for US 6 | |
 SH 78 |
33.27 | 53.54 | SH 165 southwest of Beulah | SH 45 in southwest Pueblo | 1976 | current | ||
 SH 79 |
23.89 | 38.45 | I-70 near Bennett | SH 52 at Prospect Valley | c. 1923 | current | ||
 SH 80 |
— | — | — | — | c. 1923 | 1968 | Renumbered as an extension of SH 141 to avoid confusion with I-80S | |
 SH 81 |
— | — | — | — | c. 1923 | 1938 | Became part of rerouted SH 2 (old SH 2 became SH 3 and SH 16) | |
 SH 81 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 82 |
85.29 | 137.26 | I-70 in Glenwood Springs | US 24 near Granite | c. 1923 | current | ||
 SH 83 |
77.26 | 124.34 | SH 21 in north Colorado Springs | SH 2 at Leetsdale Drive/Colorado Boulevard in Denver | c. 1923 | current | Section south of Powers Boulevard and spur SH 83 decommissioned as part of a highway swap to designate Powers Boulevard as SH 21 in October 2007; signage did not change until spring 2008; this section is now Interquest Parkway, Voyager Parkway, and Academy Boulevard; Spur SH 83 is now Academy Boulevard | |
 SH 84 |
— | — | — | — | c. 1923 | 1968 | Renumbered to SH 134 to avoid confusion with US 84 | |
 SH 85 |
— | — | — | — | c. 1923 | 1936 | Renumbered SH 189 because it intersected US 85 | |
 SH 85 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 86 |
61.47 | 98.93 | I-25 in Castle Rock | I-70 near Limon | c. 1923 | current | ||
 SH 87 |
— | — | — | — | c. 1923 | 1968 | Became part of relocated SH 75 | |
 SH 88 |
18.76 | 30.19 | Colfax Avenue and Federal Boulevard in Denver | SH 83 in Aurora | c. 1923 | current | ||
 SH 89 |
34.34 | 55.26 | SH 116 at Buckeye Crossroads | US 50/US 400 in Holly | c. 1923 | current | ||
 SH 90 |
41.9 | 67.4 | Utah State Route 46 at the Utah state line | SH 141 at Vancorum | c. 1923 | current | ||
 SH 91 |
22.57 | 36.32 | US 24 near Leadville | I-70 at Copper Mountain | c. 1923 | current | ||
 SH 92 |
73.29 | 117.95 | Crawford Avenue and Main Street in Delta | US 50 near Sapinero | c. 1923 | current | ||
 SH 93 |
19.89 | 32.01 | US 6 in Golden | SH 119 in Boulder | c. 1923 | current | ||
 SH 94 |
86.09 | 138.55 | US 24 just east of Colorado Springs | US 40/US 287 | c. 1923 | current | ||
 SH 95 |
14.32 | 23.05 | US 285 and Sheridan Boulevard in Denver | US 36 in Westminster | c. 1923 | current | ||
 SH 96 |
207.45 | 333.86 | SH 69 in Westcliffe | K-96 at the Kansas state line | c. 1923 | current | ||
 SH 97 |
4.58 | 7.37 | SH 141 near Naturita | Main Street and 3rd Avenue in Nucla | c. 1923 | current | ||
 SH 98 |
— | — | — | — | c. 1923 | 1953 | Became a portion of SH 74 | |
 SH 99 |
— | — | — | — | c. 1923 | 1954 | Section south of SH 142 deleted 1953; remainder became part of rerouted SH 142 | |
 SH 100 |
— | — | Trinidad | Kansas border | c. 1923 | 1968 | Carrier route for US 160 | |
 SH 100 |
0.41 | 0.66 | US 160 north of Vilas | A & Main streets in Vilas | 1968 | current | Formerly SH 100 Spur (created in 1965) and was part of SH 197 until 1953 | |
 SH 101 |
21.41 | 34.46 | CR K/CR 14 | US 50 in Las Animas | c. 1923 | current | ||
 SH 102 |
— | — | — | — | c. 1923 | 1968 | Carrier route for US 36 | |
 SH 103 |
22.48 | 36.18 | I-70 at Idaho Springs | CR 151 and CR 103 at Mestaa'ėhehe Pass | c. 1923 | current | ||
 SH 104 |
— | — | — | — | c. 1923 | 1953 | Decommissioned following a 1943 tunnel collapse | |
 SH 105 |
32.63 | 52.51 | I-25 near Monument | SH 67 near Sedalia | c. 1923 | current | Section from I-25 to SH 83 decommissioned as part of a highway swap to designate Powers Boulevard as SH 21 in October 2007; signage did not change until spring 2008 | |
 SH 106 |
— | — | — | — | c. 1923 | 1968 | Carrier route overlapping US 491 | |
 SH 107 |
— | — | — | — | c. 1923 | 1925 | Became part of relocated SH 2 (the old route became SH 144) | |
 SH 107 |
— | — | — | — | c. 1931 | 1953 | ||
 SH 108 |
— | — | — | — | c. 1923 | 1953 | Renumbered as SH 145 Spur | |
 SH 109 |
65.33 | 105.14 | US 160 near Kim | Cheraw | c. 1923 | current | Until 1953, continued north to Genoa | |
 SH 110 |
0.19 | 0.31 | US 550 in Silverton | Silverton | c. 1923 | current | Signed as CR 110; still a state highway, but is no longer a real part of the state highway system as of November 24, 2006 | |
 SH 111 |
— | — | — | — | c. 1923 | c. 1968 | Renumbered as an extension of SH 12; continued south to the New Mexico border until 1953 | |
 SH 112 |
27.80 | 44.74 | US 160 at Del Norte | SH 17 at Hooper | c. 1923 | current | ||
 SH 113 |
18.83 | 30.30 | US 138 northeast of Sterling | N-19 at Nebraska state line | c. 1923 | current | ||
 SH 114 |
61.74 | 99.36 | US 50 near Gunnison | US 285 in Saguache | c. 1923 | current | ||
 SH 115 |
45.99 | 74.01 | US 50 in Cañon City | I-25 in Colorado Springs | c. 1923 | current | ||
 SH 116 |
32.32 | 52.01 | US 287/US 385 near Springfield | Kansas state line | c. 1923 | current | ||
 SH 117 |
— | — | — | — | c. 1923 | 1953 | ||
 SH 118 |
— | — | SH 51 east of Two Buttes | Kansas state line | c. 1923 | 1953 | Became part of SH 116, which also replaced part of SH 51 when it was truncated | |
 SH 119 |
63.70 | 102.52 | US 6 west of Golden in Clear Creek Canyon | I-25 near Longmont | c. 1923 | current | ||
 SH 120 |
7.19 | 11.57 | SH 115 east of Florence | US 50 east of Penrose | c. 1923 | current | ||
 SH 121 |
30.43 | 48.97 | Waterton Road | US 36/US 287/SH 128 in Broomfield | c. 1923 | current | ||
 SH 122 |
— | — | Lake Circle in Broadmoor | US 85/US 87/SH 115 in Colorado Springs | c. 1923 | 1997 | Was still signed in July 1998 | |
 SH 123 |
— | — | — | — | c. 1923 | 1968 | Carrier route overlapping US 285 (later US 287) | |
 SH 124 |
— | — | — | — | c. 1923 | 1953 | ||
 SH 125 |
75.41 | 121.36 | US 40 near Granby | WYO 230 at the Wyoming state line | c. 1923 | current | ||
 SH 126 |
— | — | — | — | c. 1923 | 1953 | Spur to South Platte became SH 75 in 1939 | |
 SH 127 |
9.20 | 14.81 | SH 125 near Cowdrey | WYO 230 at the Wyoming state line | c. 1923 | current | ||
 SH 128 |
— | — | US 40S near Hartsel | SH 77 near Lake George | c. 1924 | c. 1929 | Now part of rerouted US 24 | |
 SH 128 |
10 | 16 | SH 93 south of Boulder | I-25 in Westminster | c. 1936 | current | ||
 SH 129 |
— | — | WYO 70 | US 40 | c. 1923 | 1953 | Now CR 129 | |
 SH 130 |
— | — | — | — | c. 1924 | 1953 | ||
 SH 131 |
68.72 | 110.59 | I-70/US 6 at Wolcott | US 40 south of Steamboat Springs | c. 1923 | current | ||
 SH 132 |
— | — | — | — | c. 1924 | 1975 | ||
 SH 133 |
71.40 | 114.91 | SH 92 in Hotchkiss | SH 82 in Carbondale | c. 1923 | current | ||
 SH 134 |
— | — | — | — | c. 1924 | 1953 | ||
 SH 134 |
27.0 | 43.5 | SH 131 in Toponas | US 40 north of Kremmling | 1968 | current | ||
 SH 135 |
27.48 | 44.22 | US 50 in Gunnison | Elk Avenue and 6th Street in Crested Butte | c. 1923 | current | ||
 SH 136 |
4.47 | 7.19 | US 285 in La Jara | 2nd Street South in Sanford | c. 1924 | current | ||
 SH 137 |
— | — | — | — | c. 1923 | 1953 | ||
 SH 138 |
— | — | — | — | c. 1924 | 1953 | ||
 SH 139 |
72.07 | 115.99 | I-70 in Loma | SH 64 in Rangely | c. 1923 | current | decommissioned in 1953, but restored in 1963 | |
 SH 140 |
23.4 | 37.7 | NM 170 at the New Mexico state line | US 160 near Durango | c. 1925 | current | ||
 SH 141 |
159.7 | 257.0 | US 491 near Dove Creek | South of I-70 in Grand Junction | c. 1923 | current | ||
 SH 142 |
33.8 | 54.4 | US 285 near Romeo | SH 159 in San Luis | c. 1925 | current | Until 1954, followed CR-P from SH 99 (now CR-11) to SH 159; rerouted on current route due to restoration of SH 248 | |
 SH 143 |
— | — | — | — | c. 1923 | 1953 | ||
 SH 144 |
28.7 | 46.2 | I-76 west of Wiggins | SH 52 in Fort Morgan | c. 1925 | current | ||
 SH 145 |
116.1 | 186.8 | US 160 in Cortez | SH 141 near Naturita | c. 1923 | current | ||
 SH 146 |
— | — | — | — | c. 1926 | c. 1937 | ||
 SH 146 |
— | — | — | — | c. 1938 | c. 1953 | Later restored as part of a longer SH 32 | |
 SH 146 |
— | — | — | — | 1970 | 1986 | Became part of SH 141; portions were formerly SH 403 | |
 SH 147 |
— | — | — | — | c. 1923 | 1978 | Became a portion of SH 184 | |
 SH 148 |
— | — | — | — | c. 1926 | 1953 | decommissioned in 1928 but restored in 1929 | |
 SH 149 |
117.5 | 189.1 | US 160 in South Fork | US 50 west of Gunnison | c. 1923 | current | ||
 SH 150 |
16.1 | 25.9 | US 160 west of Blanca | Great Sand Dunes National Park | c. 1928 | current | decommissioned in 1953 but restored in 1960 | |
 SH 151 |
33.9 | 54.6 | SH 172 in Ignacio | US 160 east of Chimney Rock | c. 1923 | current | ||
 SH 152 |
— | — | — | — | c. 1928 | c. 1982 | ||
 SH 153 |
— | — | — | — | c. 1923 | 1968 | Renumbered as an extension of SH 2 | |
 SH 154 |
— | — | — | — | c. 1926 | 1953 | Section west of SH 61 became an extension of SH 59 and remainder removed | |
 SH 155 |
— | — | — | — | c. 1923 | 1953 | ||
 SH 156 |
— | — | — | — | c. 1928 | c. 1938 | ||
 SH 156 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 157 |
— | — | US 24 near Falcon | SH 86 in Kiowa | c. 1923 | 1954 | Followed Elbert Road then Kiowa–Bennett road until 1953; remainder decommissioned in 1954 in exchange for restoring SH 217 | |
 SH 157 |
3.7 | 6.0 | US 36 in Boulder | SH 119 in Boulder | c. 1974 | current | ||
 SH 158 |
— | — | — | — | c. 1929 | 1953 | ||
 SH 159 |
33.6 | 54.1 | NM 522 at the New Mexico state line | US 160 near Fort Garland | c. 1923 | current | ||
 SH 160 |
— | — | — | — | c. 1929 | 1968 | Renumbered as an extension of SH 72 to avoid confusion with US 160 | |
 SH 161 |
— | — | — | — | c. 1923 | c. 1935 | ||
 SH 161 |
— | — | — | — | c. 1935 | 1953 | ||
 SH 162 |
— | — | — | — | c. 1929 | 1984 | Now CR 162 | |
 SH 163 |
— | — | — | — | c. 1923 | 1968 | Carrier route overlapping US 285 | |
 SH 164 |
— | — | — | — | c. 1929 | c. 1934 | ||
 SH 164 |
— | — | — | — | c. 1935 | 1953 | ||
 SH 165 |
37.1 | 59.7 | SH 96 east of Silver Cliff | I-25 near Colorado City | c. 1923 | current | ||
 SH 166 |
— | — | — | — | c. 1933 | 1953 | Became US 385 around 1959 | |
 SH 167 |
4.86 | 7.82 | CR JJ south of Fowler | SH 96 near Fowler | c. 1923 | current | ||
 SH 168 |
— | — | US 287/SH 1 in Louisville | SH 7 in Lafayette | c. 1933 | c. 1953 | Now mostly SH 42; may have been partially restored in 1961, but become part of SH 42 in 1965 | |
 SH 169 |
— | — | — | — | c. 1923 | c. 1970 | ||
 SH 170 |
— | — | — | — | c. 1933 | c. 1938 | ||
 SH 170 |
6.97 | 11.22 | Eldorado Canyon State Park | US 36 in Superior | c. 1938 | current | ||
 SH 171 |
— | — | — | — | c. 1926 | c. 1938 | ||
 SH 171 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 172 |
24.5 | 39.4 | NM 511 at the New Mexico state line | US 160 southeast of Durango | c. 1933 | current | ||
 SH 173 |
— | — | — | — | c. 1926 | c. 1938 | ||
 SH 173 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 174 |
— | — | — | — | c. 1935 | c. 1938 | ||
 SH 174 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 175 |
— | — | — | — | c. 1926 | c. 1938 | ||
 SH 175 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 176 |
— | — | US 385 in Holyoke | N-23 at the Nebraska state line | c. 1935 | 1989 | Decommissioned in 1952; restored in 1968; changed to SH 23 to avoid confusion with nearby I-76 and to match Nebraska | |
 SH 177 |
6.11 | 9.83 | SH 470 at Highlands Ranch | US 285 in Cherry Hills Village | c. 1928 | current | ||
 SH 178 |
— | — | — | — | c. 1935 | c. 1940 | ||
 SH 178 |
— | — | — | — | c. 1940 | 1953 | ||
 SH 179 |
— | — | — | — | c. 1929 | 1953 | ||
 SH 180 |
— | — | — | — | c. 1935 | 1968 | ||
 SH 181 |
— | — | — | — | c. 1929 | 1953 | ||
 SH 182 |
— | — | — | — | c. 1939 | 1968 | Carrier route overlapping US 6 | |
 SH 183 |
1.00 | 1.61 | Fort Lyon | US 50 near Las Animas | c. 1933 | current | ||
 SH 184 |
25.5 | 41.0 | US 491 near Lewis | US 160 Bus. in Mancos | c. 1938 | current | ||
 SH 185 |
— | — | — | — | c. 1933 | 1968 | Carrier route overlapping US 87; now I-25 | |
 SH 186 |
— | — | — | — | c. 1933 | 1953 | ||
 SH 187 |
0.69 | 1.11 | SH 133 near Paonia | Paonia | c. 1934 | 2010 | Now Grand Avenue | |
 SH 188 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 189 |
— | — | — | — | c. 1935 | 1953 | ||
 SH 190 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 191 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 192 |
— | — | — | — | c. 1938 | c. 1968 | ||
 SH 193 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 194 |
20.33 | 32.72 | SH 109 near La Junta | US 50 near Las Animas | c. 1938 | current | ||
 SH 195 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 196 |
8.92 | 14.36 | US 50 near McClave | US 287 near Wiley | c. 1938 | current | ||
 SH 197 |
10.00 | 16.09 | US 160/SH 100 north of Vilas | CR T south of Vilas | c. 1938 | c. 1953 | Northern portion later restored as SH 100 Spur, and is now SH 100 | |
 SH 198 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 199 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 200 |
— | — | — | — | c. 1938 | c. 1951 | ||
 SH 200 |
— | — | — | — | c. 1951 | c. 1968 | Now CR 74E | |
 SH 201 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 202 |
3.23 | 5.20 | Otero CR 16/CR FF | US 50 in Rocky Ford | c. 1938 | current | ||
 SH 203 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 204 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 205 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 206 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 207 |
5.94 | 9.56 | US 50 in Manzanola | SH 96 in Crowley | c. 1938 | current | ||
 SH 208 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 209 |
1.53 | 2.46 | US 50 | SH 96 in Boone | c. 1938 | current | ||
 SH 210 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 211 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 212 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 213 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 214 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 215 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 216 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 217 |
— | — | — | — | c. 1938 | c. 1964 | decommissioned in 1953, but partially restored in 1954 | |
 SH 218 |
— | — | — | — | c. 1938 | c. 1951 | ||
| SH 218 |
— | — | — | — | c. 1951 | 1953 | ||
 SH 219 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 220 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 221 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 222 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 223 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 224 |
3.63 | 5.84 | US 36 | US 6/US 85 | c. 1938 | current | ||
 SH 225 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 226 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 227 |
1.85 | 2.98 | US 50 Bus. | SH 96 in Pueblo | — | — | sections south of US 50 Bus. and north of SH 96 eliminated 1953 | |
 SH 228 |
— | — | — | — | c. 1938 | c. 1954 | section west of SH 227 removed 1953; rerouted south replacing part of SH 227 | |
 SH 229 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 230 |
— | — | — | — | c. 1938 | c. 1939 | ||
 SH 230 |
— | — | — | — | c. 1940 | 1953 | ||
 SH 231 |
2.05 | 3.30 | US 50 Bus. | US 50/SH 96 near Pueblo | c. 1938 | current | ||
 SH 232 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 233 |
— | — | US 50 Bus. | US 50/SH 96 near Pueblo | c. 1938 | 2017 | ||
 SH 234 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 235 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 236 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 237 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 238 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 239 |
3.35 | 5.39 | US 160 in Trinidad | CR 32/CR 75 | — | — | section northeast of El Moro removed 1955 | |
 SH 240 |
— | — | — | — | c. 1938 | c. 1954 | ||
 SH 241 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 242 |
— | — | — | — | c. 1938 | 1982 | ||
 SH 243 |
— | — | — | — | c. 1938 | c. 1951 | ||
 SH 244 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 245 |
— | — | — | — | c. 1938 | c. 1961 | ||
 SH 246 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 247 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 248 |
— | — | — | — | c. 1938 | 1982 | decommissioned in 1953, but restored in 1954 | |
 SH 249 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 250 |
— | — | — | — | c. 1938 | 1948 | ||
 SH 251 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 252 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 253 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 254 |
— | — | — | — | c. 1938 | 1953 | Renumbered as an extension of SH 119 | |
 SH 255 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 256 |
— | — | SH 60 in Milliken | US 85 in Peckham | c. 1938 | 2007 | Decommissioned in March 2007 as part of the north front range route swap | |
 SH 257 |
18.48 | 29.74 | SH 60 in Milliken | SH 14 east of Fort Collins | c. 1938 | current | ||
 SH 258 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 259 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 260 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 261 |
— | — | — | — | c. 1938 | c. 1951 | ||
 SH 262 |
— | — | — | — | c. 1938 | c. 1965 | Renumbered as an extension of SH 66 | |
 SH 263 |
2.73 | 4.39 | US 85 in Greeley | Greeley | c. 1938 | current | Section from US 85 Bus. to US 85 and from current east end to SH 37 decommissioned in March 2007 as part of the North Front Range route swap | |
 SH 264 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 265 |
— | — | — | — | c. 1938 | c. 1941 | ||
 SH 265 |
3.62 | 5.83 | I-70 at Denver | US 6/US 85 at Commerce City | c. 1941 | current | ||
 SH 266 |
— | — | — | — | c. 1938 | c. 1939 | ||
 SH 266 |
— | — | — | — | c. 1949 | c. 1951 | ||
 SH 266 |
11.52 | 18.54 | US 50/SH 17 at Rocky Ford | SH 109 near Cheraw | c. 1951 | current | ||
 SH 267 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 268 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 269 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 270 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 271 |
— | — | — | — | c. 1938 | c. 1939 | ||
| SH 271 |
— | — | — | — | c. 1939 | c. 1941 | ||
 SH 271 |
— | — | — | — | c. 1942 | 1953 | ||
 SH 272 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 273 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 274 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 275 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 276 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 277 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 278 |
— | — | — | — | c. 1938 | 1986 | ||
 SH 279 |
— | — | SH 119 in Black Hawk | Central City | c. 1938 | 1999 | Originally routed from Mestaa'ėhehe Pass through Idaho Springs to Apex, northwest of Central City | |
 SH 280 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 281 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 282 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 283 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 284 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 285 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 286 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 287 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 288 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 289 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 290 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 291 |
9.14 | 14.71 | US 50 at Salida | US 285 | c. 1938 | current | ||
 SH 292 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 293 |
— | — | — | — | c. 1938 | 1953 | swapped with SH 78/US 6 when Vail Pass was completed | |
 SH 294 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 295 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 296 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 297 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 298 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 299 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 300 |
3.36 | 5.41 | US 24 near Leadville | Leadville National Fish Hatchery | c. 1938 | current | ||
 SH 301 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 302 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 303 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 304 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 305 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 306 |
— | — | — | — | c. 1938 | 1984 | Now CR 306 | |
 SH 307 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 308 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 309 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 310 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 311 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 312 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 313 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 314 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 315 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 316 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 317 |
12.24 | 19.70 | SH 13 in Hamilton | CR 29 | c. 1938 | current | ||
 SH 318 |
60.46 | 97.30 | Utah state line | US 40 west of Maybell | c. 1938 | current | ||
 SH 319 |
— | — | — | — | c. 1938 | c. 1939 | ||
| SH 319 |
— | — | — | — | c. 1939 | c. 1941 | ||
 SH 319 |
— | — | — | — | c. 1941 | 1953 | ||
 SH 320 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 321 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 322 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 323 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 324 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 325 |
11.39 | 18.33 | SH 13 north of Rifle | CR 217 in Rifle Mountain Park | c. 1938 | current | ||
 SH 326 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 327 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 328 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 329 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 330 |
11.39 | 18.33 | SH 65 | Grove Creek Road in Collbran | c. 1938 | current | ||
 SH 331 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 332 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 333 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 334 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 335 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 336 |
— | — | — | — | c. 1938 | c. 1941 | ||
 SH 336 |
— | — | — | — | c. 1942 | c. 1954 | ||
 SH 337 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 338 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 339 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 340 |
13.36 | 21.50 | US 6 in Fruita | I-70 Bus. in Grand Junction | c. 1938 | current | ||
 SH 341 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 342 |
— | — | — | — | c. 1938 | c. 1948 | ||
 SH 342 |
— | — | — | — | c. 1949 | 1953 | ||
 SH 343 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 344 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 345 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 346 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 347 |
5.17 | 8.32 | US 50 near Montrose | Inside Black Canyon of the Gunnison National Park | c. 1938 | current | ||
 SH 348 |
17.05 | 27.44 | US 50 in Delta | US 50 in Olathe | c. 1938 | current | ||
 SH 349 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 350 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 351 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 352 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 353 |
— | — | — | — | c. 1938 | 1953 | Later became part of SH 110 | |
 SH 354 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 355 |
— | — | — | — | c. 1938 | c. 1951 | ||
 SH 355 |
— | — | — | — | c. 1951 | c. 1967 | ||
 SH 356 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 357 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 358 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 359 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 360 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 361 |
— | — | — | — | c. 1938 | 1984 | Now FR 853 | |
 SH 362 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 363 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 364 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 365 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 366 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 367 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 368 |
12.33 | 19.84 | SH 370 | US 285 near Alamosa | c. 1938 | current | ||
 SH 369 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 370 |
14.15 | 22.77 | SH 15 | US 285 near Alamosa | c. 1938 | current | ||
 SH 371 |
6.07 | 9.77 | SH 15 near La Jara | SH 368 | c. 1938 | current | ||
 SH 372 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 373 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 374 |
— | — | — | — | c. 1938 | 1990 | ||
 SH 375 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 376 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 377 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 378 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 379 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 380 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 381 |
— | — | — | — | c. 1946 | 1953 | ||
 SH 382 |
— | — | — | — | c. 1938 | c. 1967 | Renumbered to SH 49/US 36 when the Denver-Boulder Turnpike became free | |
 SH 383 |
— | — | — | — | c. 1946 | 1953 | ||
 SH 384 |
— | — | — | — | c. 1938 | 1953 | ||
 SH 385 |
— | — | — | — | c. 1947 | 1953 | ||
 SH 386 |
— | — | — | — | c. 1947 | 1953 | ||
 SH 387 |
— | — | — | — | c. 1947 | c. 1948 | renumbered SH 388 | |
 SH 387 |
— | — | — | — | c. 1948 | 1953 | ||
 SH 388 |
— | — | — | — | c. 1948 | 1953 | ||
 SH 389 |
12.65 | 20.36 | New Mexico state line, near Branson | US 160 | c. 1949 | current | ||
 SH 390 |
— | — | — | — | c. 1949 | 1953 | ||
 SH 391 |
9.51 | 15.30 | US 285 in Lakewood | I-70 in Wheat Ridge | c. 1951 | current | ||
 SH 392 |
45.33 | 72.95 | US 287 near Fort Collins | SH 14 near Briggsdale | c. 1949 | current | Extended east from CR 55 to SH 14 and west from I-25 to SH 287 in March 2007 as part of the north front range route swap | |
 SH 393 |
— | — | — | — | c. 1950 | 1953 | ||
 SH 394 |
9.25 | 14.89 | Victory Way in Craig/US 40 | Moffat County–Routt County line | c. 1949 | current | ||
 SH 395 |
— | — | — | — | c. 1950 | 1953 | ||
 SH 396 |
— | — | — | — | c. 1950 | 1953 | ||
 SH 397 |
— | — | — | — | c. 1950 | 1953 | ||
 SH 398 |
— | — | Eldorado Springs | SH 93 | c. 1950 | 1977 | Renumbered as an extension of SH 170 | |
 SH 399 |
— | — | — | — | c. 1951 | 1953 | ||
 SH 400 |
— | — | — | — | c. 1951 | c. 1958 | ||
 SH 401 |
— | — | — | — | c. 1951 | 1953 | ||
 SH 402 |
4.23 | 6.81 | US 287 in Loveland | I-25 | c. 1951 | current | ||
 SH 403 |
— | — | — | — | c. 1951 | 1953 | Later restored as part of a longer SH 146 | |
 SH 404 |
— | — | — | — | c. 1951 | 1953 | ||
 SH 470 |
27.29 | 43.92 | US 6 in Golden | I-25/E-470 in Lone Tree | c. 1970 | current | Was originally planned as Interstate 470 | |
 SH 789 |
396 | 637 | US 666 at the New Mexico state line | WYO 789 near Baggs | c. 1954 | c. 1984 | Was to be part of a proposed US 789 through Colorado, now part of US 491, US 160, US 550, US 50, I-70 and SH 13 | |
| ||||||||
| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 SH 7 Bus. |
1.592 | 2.562 | SH 7 in Allenspark | SH 7 east of Allenspark | — | — | ||
| SH 78 Bus. |
1.493 | 2.403 | CR 225 (Central Avenue) in Beulah | SH 78 in Beulah Valley | — | — | ||
| SH 82 Bus. |
2.41 | 3.88 | SH 82 west of Basalt | SH 82 southeast of Basalt | 1988 | c. 2007 | Turned back to local control between 2005 and 2007 | |
  SH 109 Spur |
0.2 | 0.32 | US 50 in La Junta | SH 109 in La Junta | 1939 | current | Runs down on Bradish Avenue from US 50 and then on 3rd Street to SH 109 (Adams Avenue) | |
| SH 119 Spur |
0.2 | 0.32 | US 6 | SH 119 | 1998 | 1998 | Temporary designation for the current SH 119 at the US 6 intersection during a reconstruction project. SH 119 was planned to be shifted to what is now an abandoned tunnel | |
| SH 257 Spur |
1.1 | 1.8 | Barricade near SH 257 south of Windsor | US 34 Bus. near Greeley | — | — | Disconnected spur route of SH 257. Only indicated at the intersection with US 34 Bus | |
| ||||||||
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